Door



'J.-H. IVHLLER.

Feb. 13, 1923.

DOOR.

.flLED SEPT,18{1922.

3 SH'EETSSHEET I.

INVENTOR ATTORN EY Feb. 13, 1923, 1,444,848.

J. H. MILLER. v

DOOR.

FlLED SEPT: 18, 1922. 3 SHEETS-SHEET 2- WITNESSES ATTORNEY Patented else, 13, 1923 resent-es JOHN H. -MILLER, or maennuri, wns'r virtsmm,

" noon.

Application fi1ed. September To all whom it may concern:

Be t known that I, Join; H. MILLER, a citizen ot the United States, residing at MacDunn, in the county of Fayette and State of West Virginia, have invented new and useful Improvements in Doors, or which the following is a specification.

This invention relates to mine doors, and

has for its chief characteristic, theprovision of means whereby the doors are automatically opened and closed by the car as it approaches the door entrance forming either side of the door.

More specifically stated, the invention makes use of door sections mounted ior sliding movement toward and away from eachv other, the doors being connected together by cables trained over suitable guide pulleys, and having associated therewith a weight for returning the doors to closed positions, car actuated mechanism being arranged along the rails of the track at the opposite sides of the door opening, and operable as the cars approach the door opening to autoor animal to pass through the door opening without actuating the door opening means above referred to. i

The nature and advantages of the invention will be better understood when the following detailed description is read in connection with the accompanying drawinga'the invention residing in the construction, combination, and arrangement of parts as claimed.

In the drawings forming part of this ap plication, like numerals of reference indicate similar parts inthe several views, and where1n:

Figure 1 is a view/in elevation, showing the doors in their normally closed positions. I.

Figure 2 is a top plan view. Figure 3 1s a longltudlnal sectional view.

Figure 4: is a sectional view taken on line 4.i of Figure 2.

Referring to the drawings in detail, A indicates a door frame of proper dimensions is, 1922, Serial in), 588,950.

- for use in mines, the door opening being of .a size to allow the passage th'erethrough of the mine cars. The trackfor these cars, is obviously passed through the door opening and indicated at 10. The door opening is normally closed by 'means'of the sliding doors' l2, the latter being movable along suitable" tracks 13, and'adapted to slide toward andaway from each other as Will be readily apparent. The doors may be hung for this purpose in any suitable manner These doors are connected by cables in a manner so that when one door is positively actuated by means to be hereinafter described, movement is imparted to the other door, so thatthe door simultaneously opens and closes. As shown, one of these cables isindicated at'15, and has one end secured toone' of the doors and its opposite end supporting a weight'jl6, which is elevatedincident to the opening of the doors and utilized to automatically close the doors as the cars pass ofii'the track? "Th'e'cable 15'is trained over a guide pulley 17, which is mounted on a suitable upright 18.- The other-of the cables for the purpose above mentioned is indicated at 19, and has'its free end" secured totheother of the doors, this cable being trained over a guide pulley 20 mounted on a suitable bracket 21 to providespaced runs.

The other run of this cable is'secu'red to the adjacent door, so that the doors are simultaneously actuated asabove described.

The means for automatically opening the doors as the cars approach the door opening is identical onbothsides of the door opening, and which'means includes a transverse shaft 22 jour'n'aled in suitable bearings 23 and provided at one end with an upwardly extending lever 24. This lever is connected to one end of'a cable'25 which is trained over a suitable pulley 26 supportedby a i post or upright 27 the'cable passing from the pulley just mentioned onto a similar pulley 28 mounted on the same upright, but arranged at a rightangle to the pulley 26. The pulley 28 forms a part of a duplex.

pulley, inasmuch as it is associ-ated"with.

a lar er pulley 29 and this'pulley has secured thereto one "end "of a short cable 30 which is; adaptedto be wound about and unwound from said pulley to open and close the doors, this cable 30 being terminally connected to'the adjacent door. Manlfestl'y, when the shaft 22 is. part ally rotated in one directiomthe lever 24 exerts a pull upon the cable 25, which rotates the duplex pulley, causing the cable 30 to be wound about the pulley 29 and thus move the doors to opened positions. lVhen'the shaft is rotated in an opposite direction, the cable unwinds from the pulley 29 as the weight 16 gravitates to itslowered position. For the purpose of controlling the movements of the shaft 22, I employ a trip rail whichv is pivoted at one end as. at 33 on the adyacent rail oi the track, and this. rail is normally track, or in other words, slightly arranged at an inclination to the rail of the elevated therefrom to be depressed by the weight oi the locomotive passing thereover. This tripping rail is equipped with a link 33, which in turn is connected with an arm 3% projecting from the shaft 22, the parts being arranged so that when the tripping rail is depressed, the shaft is partially rotated in the proper direction to move the doors to an open position in a manner above described. The lever 24 at the opposite sides of the door o-pcning'are connected by a cable 36.50 that the levers are actuated simultaneously, irrespective of from which side of the door opening the cars approach said opening,

and this cable 36 is trained over suitable guide pulleys 27 .journaled in brackets 88.

Itwill be noted that each door is made up of a plurality ofsections, the sections being connected together by double hinges 89 which permit these sections to be moved singly or in unison in either direction through the door opening, so. that should the doors becomestuck any reason, the locomotive is allowed to pass through the door opening without injury to either the locomotive or the doors, and which construction also permits aperson or an animal to pass through the door opening without opening the doors by means oi? the car actuated mechanism above described. door sections are connected together by coiled springs or other resilient elements 40 which pass through alined openings in thedoor sections asshown. I

While it is believed that from the foregoing description, the nature and advantages of the invention will be better understood, I desire to have it understood that I do; not limit myself to: what is herein shown-and describech'and that. such changes may be resorted to when 1 desired as fall within the, scope of what is claimed.

-1..' A mine door. members mounted 'tor'fsliding' movement, to-

wardand away from each other, guide pulleys supported adjacent the door opening,

5 cables trainedgove'r said pulleys, the adjacent ends ofthe cablesbemg crossed and terminallyysecured to the door members, car.

actuated means operable to" automatically" The comprising two door atedlmeans operable to automatically open the doors, said means inc-ludinn' a duplex pulley, the pulleys of whlch are or relatively different size, a cable connected to the latch oi saidpulleys and also to the adjacent door,

a second cable connected to the latter mentioned door and trained over a pulley and having its terminal connected. to the other door, a tripping rail adapted to be depressed by the weight of the cars, a connection be tween said rail and the duplex pulley for rotating the latter in a proper direction to open said doors, and means including a cable, and a weight suspended therefrom for automatically closing said doors as the cars pass off the rail.

3. A mine door, composed of two door members mounted for sliding movei out to ward and away from each other, a duplex pulley, the component parts, of which are of relatively different size, a second pulley ar ranged at a right angle to the duplex pulley,

a cable secured to one of the door members and trained over a larger part of the duplex. pulley, a second cable secured to the latter mentioned door, and trained over a guide,

n'ientioned pulley, and means for automati callyclosing the doors when. the tripping rail is released. p

4;. A mine door, composed. o l? two door members mounted tor sliding; movement tofard and z-iway tromcich other, means for automatically opening the doors, and including associated large and small pulleys, a cable secured to the large pulley and to one oithe door members, a second cable connectinn both of the door members, whereby the latter are actuated in unison, a transverse shaft mounted lT OY partial rotation, a trip ping rail connected with the shaft and adapted to be depressed by the weightof the cars to rotate the shaft in one direction, a

lever carried by one end of the shaft, a cable terminally connected with. said lever and trained over the small pulley, a second pulley arranged at a right angle to said small pulley and under which the latter mentioned cable is trained, whereby said cable is actuated to open the doors when the trip rail is llf) depressed, and means for automatically ClOP- ing the doors incidentto the release of the tripping rail.

5. A mine door, composed of two door members mounted for sliding movement toward and away from each other, car actuated means for automatically opening the doors, means for vautomatically closing the doors, and each door comprising a plurality ofhingedly connected sections susceptible of being swung in either direction through the door opening,'singly or in unison, and re silient means connecting the respective sections of each door for normally holding the JOHN H. MILLER. 

